Hello Doctor, I am 14 weeks pregnant. For the past 1 week I have had severe blocked nose (both nostrils), thick white mucus, mucus dripping into throat, frequent coughing, especially at night. The cough becomes severe and triggers vomiting of mucus, food, and water. I used Otrivin nasal spray for about 1 week. Daytime breathing is sometimes okay, but nights are worse and I wake with dry mouth from mouth breathing. No fever or facial pain. Please advise safe treatment during pregnancy .